His crime spree came to an end on March 13, when he was pulled over in Lufkin after withdrawing cash from the bank account of Samantha Koenig, an 18-year-old Alaskan he had killed a month earlier. He committed suicide on December 2 as he sat in an Anchorage prison cell, slitting his wrists and strangling himself with his own bedding.

Keyes leaves behind a lot of open questions that the FBI would very much like answered. Among other things, they want to know exactly he was doing when he traveled through North Texas following Koenig's murder.

The FBI's Dallas office sent out an alert this afternoon seeking information about what Keyes' activities as he passed through through Dallas and Glen Rose areas between February 12 and 16.

Keyes admitted that he traveled through Azle, Aledo, and Cleburne during that period. Investigators think his rental vehicle, a 2011 Kia Soul, might have become
stuck in a muddy, rural area outside Cleburne. They also think he stopped by the Post Oak Cemetery near Glen Rose.

The FBI wants to talk to anyone who saw Keyes or his vehicle during that time. Anyone with info can call the easy-to-remember 1-800-CALL-FBI.